Typewriter mechanism



A. SIEPMANN AND A. RADEMACHER.

TYPEWRITER MECHANISM. APPLICATION H'LED FEB. 14. 1921.

Patented Feb. 7, 19.221

3 S HEETSSHEET I.

A. SIEPMANN AND A. RADEMACHER.

TYPEWRITER MECHANISM.

APPLICATION FILED FEB. H, 1921.

Patented Feb. 7, 1922..

'3 SHEETS-SHEET 2- FiCLB. A

FiqQs.

A. SIEPMANN AND A. R'ADEMACHER.

TYPEWRITERv MECHANISM.

APPLICATION FILED FEB. 14. 1921.

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U" Ila-l2" 2 2 n A mm 9 5 1, E 0 ll 4 7 mm m C 1 S :iil lilII/ll m m G H n A. I w H MPH v m I, I A r N. m 4 D 4' 4 D UNITED STATES PATENT OFFIC noLr .SIEP'M'ANN "AND AUGUST RADEMACHER, or Essen, GERMANY, ASSIGNORS 'ro rmnn'xaurr 'AKTIENGESELLSCHAFT, or ESSEN-ON-THE-RUHR, GERMANY.

TYPEJVRITER MECHANISM Specification of Letters Patent.

' Patented Feb. *7, 1922.

Application filed February 14, 1921. Serial No. 444,866.

To alljwhom it may concern.

Be it known that we, ADoLr SIEPMANN, residing at Essen, Germany, and, AUGUST RADEMACHER, residing at Essen, Germany, both citizens'of the Republic of Germany, have inventeda ce-rtainnew and useful Improvement in Typewriter Mechanism, (for which we have filed an application in Germany, December 5, 1919,) 'of which the following is a specification.

This invention relates. to .ty-pewriting anechanisms having a unique type key and subject matter of the invention and in which:

Fig. 1 is a diagrammatic view, partly in section and partly in side elevation of the typewriting mechanism,

Fig. 2 is a'front view, partly in section, of parts of the typewriting mechanism,

Fig. 3 is a similar view of a'modified form of the mechanism,

Fig. lis a side view pertinent to Fig. 3,

Figs. 5 to 11 are diagrammatic views, partly inscction and partly in elevation, of

seven forms of execution of the index device belonging to the typewriting mechamsm,

Fig. 12 1s a diagrannnatical view. in vertical section of an adjusting device for the typewriting mechanism suitable for-the in dex device inaccordance with the construction disclosed in Fig. 5,

Fig. 18 is a'similar view of an adjusting device for the typewritingmechanism suitable for the remaining index devices, and

F'igcle is a section on line 1414= in Fig. 13 looking from the left.

The mechanism illustrated in Figs. 1 and 9 will be described first.

The typewri-ting mechanism is provided \vitlra unique tpye key A mounted on a two-armed lever A This key-lever is con nected by intervention of a guide a b to a lever B pivoted at b and the other arm of WflllCll forms a casing C. This latter is provided with a female thread 0 for amale thread 6Z arranged on the shaft D of a cylinder D. Onthe shell surface of this cylinder the types are disposed, and. that along the several turns of a continuous screw line. The pitch ofthese turns corresponds Opposite to the pitch of the. threadc (P. to the type cylinder Dthere is arranged a paper roller E. (Fig. 1). A spring 0 (Fig. 1'), engaging both the casing C and the frame of the machine tends to maintain the parts A; B, G, D in theinoperative position disclosed inithe drawing in which the casing, C -comes to abut against a stop 0 (Fig. l) of said frame. Y

.As a result of the aforesaid arrangement of theparts, the type cylinder D is caused to strike against the roller E whenthe key .1 is depressed, so that the type which hap pens to be nearest to said roller will now make a print onthe paper. The particular type desired is setup in the printing position by 'a rotation of-the shaft D of the type cylinder by means of a mechanism which will be more fully described hereinafter. The roller E may be fed forward from letter to letter me from line to line by any one of the ncthods known in the art. The spaces between-the words may likewise be made in the customary manner by means of a spacing key. v r in the device illustrated in Fig. 5, an'indcx F adjustable relatively to a horizontally disposed row of letters F ismounted on. a vertical shaft f supporting a roller F serving to guide a steel band F. This band, I as Fig. 12 shows. is run" across a second roller'G, the shaft 9 'of-which is lodged in a frame 0. The frame C is lodged to oscillate on the frame of the machine by means of pivots c and'is connected with the key lever A, A in the same manner as the casing C disclosed in Figs. 1 and 2, by intervention of an intermediate lever B. The shaft D of the type cylinder D is adapted to engage by means of a thread (Z a female thread 0 formed in the frame C Upon the shaft of the'band roller G -there is mounted a broad spur wheel Gtmeshing with a narrow spur wheel D mounted upon the shaft D 7 In consequence of this arrangement, the action of setting the index F upon a letter belonging to the row F which is directly effected by hand, is transmittedby aid of the gearing f F F G g G G to the shaft lar letter upon which the index F has been setwithin the row F will come to face the roller E. In order to allow of an absolutely accurate adjustment of the type cylinder D to be effected, the band rollers F 3 and G may be provided with teeth adapted to engage perforations formed in the steel band F It may further be noted that the section of the band F lying intermediate the rollers F andG is located in parallel to the axis of the pivots '0 When the frame is rocked about the of the pivots 0 the band will therefore not be stretched to any notable degree, but will merely obtain a slight twist.

In the form of execution shown in Fig. 6, the vertical shaft f of the index F is positivelv connected by means of two bevel wheels H, H to a shaft 72 whence the shaft connected to the key lever of the mechanism.

The bevel wheel I) is disposed between two bearings for the shaft D and connected to this-said shaft so as to allow of shift but not of rotation relatively to the latter by means of a transversely disposed wedge passing through a: slot d formed in the shaft D The height of-the'teeth of the pair of bevel wheels H D is so dimensioned that they will not come to disengage when the frame C is rocked.

In the form of execution shown in Fig. 7, the shaft f of the index F is disposed horizontally and is connected by intervention of a pair of spur wheels J J with a shaft 71 the rotation of which may be transmitted upon the shaft of the type cylinder by aid of the gear illustrated in Figs. 13 and 14.

The same applies to the arrangement according to Fig. 8. However, in this case the row of letters, K is not disposed, as the row of letters F of the forms of execution shown in Figs. 5, 6 and '7 along the arc of'a circle,

the centre of which lies within the axis of the shaft of the index, but rather along a flat are of a circle, the centre of which is dis posed considerably below the shaft of the index K K By these means there is se In this case, the index comprises two. parts K K adapted to telescope of which the part K having the point, is adapted to move by aid of a pin within a groove 7: formed concentrically to the row of letters K within the wall of the machine, so that the index when rocked will alter its position while the point thereof will however always be dis.-

posed above the row of letters. 7

According to the form of execution shown in Fig. 9, the row of letters M of the index mechanism is arranged along a straight line. In this case, the index M moves along a straight path on the wall surface of themachine and is fixed to a steel band N running across two band rollers N by means of an arm m projecting into the interior of the machine. band rollers may be positively connectedito' the shaft of the type cylinder by means of the gearing disclosed in Figs. 13 and A.

The shaft of one of the two In the arrangement shown in Fig. 10, the I letters of the index mechanism are disposed in a plane in three rows P to facilitate to an increased degree the reading off thereof. A certain number of the full turns of the thread along which'the types are arranged on the cylinder D corresponds to the length of each of the rows of letters P Vi henever therefore it be desired to shift the index 17,

(Fig. 10) from one row of letters P to another, then obviously the type cylinder must be eitherraisedor lowered for the corre-' sponding number of turns. 7 To this end, the oscillating element (casing or frame) supporting the type cylinder D, comprises two telescoping parts C C (Figs. and 4:).

The one of these parts C is mounted on the fulcrum Z2 of the bell crank lever 13 con nected to the he -lever A A (Fig. 1) while the other part, is adapted to more on the part C and is provided with the female thread 0 for the tapped portion (Z of the shaft D of the type cylinder; On the part C there are in addition arranged two pins thereto, two rods 39 lodgedin horizontallydisposed guiding means'on the frame of the machine. The one of these two rodsengages a bell crank lever 19 which is connected to saidcog 0 engages one of the said. notches and thereby adjusts, say in the event the in dex P should happen not to have been accurately set upon a row of letters P the height of the parts C 9, D in'such a manner thattherewill be secured an absolute alignment on the paper. v 1 In the case of the index mechanism illustrated in Fig. 11, the letters-arearranged in three rows R on a oylinderS arranged to ro tate on the frame-of the machine. 7

f The index R is caused to move along straight line on the fra-meof the machine in parallelto the axis ofthe cylinder S and is connected to an arm 1" adapted to engage a steelband T running across two rollers T The. shaft of the type cylinder is again driven by the shaft tof the one roller T A handle 1"? is connected to the body of the index in such wise as to permit :of the said handle being displaced in a vertical sense relatively to the index .while at the same time adapted to take the index along in the case of a movement effected in parallel to the axis of the cylinder S. In the course of this movement, the handle 71 slidesalong a rod 1', for its part arranged to engage by means of pins a longitudinal slots formed in two levers r mounted tooscillate at 1 on the frame of the machine. The one of these two levers r engages by means of two longitudinal slots, respectively, a pin 8 of the cylinder S and, atr asystem of levers connected to the pin 0 (Figs. 3 and 4:). As a result of this arrangement the type, cylinder is rotated by intervention of the parts 7 ,1, T t whenever the handle 4 is displaced along the rod 1*. Moreover, when the handle 1? is caused to effect a movement in the vertical direction, then by intervention ofthe partsc r s and-r on the. one hand, another row ofle-tters R is moved in front of the point of the index, while, on the other hand,

the type cylinder is either raised orlowered.

Claims. I

- l. A typewriting mechanism comprising a type carrier having a plurality of c1rcumferentially extending types andmounted for rotation to effect type selection, an index and pointer, and means connecting said pointer to said type carrier and ncluding a screw-threaded guide for selecting the type.-

2. A typewriting mechanism comprising a cylindrical type carrier having a plurality of circumferentially extending types and mounted for rotation to effect type selection, a type key operatively connected to said type carrier for effecting printing and means for effecting type selection compriswith' and-a gearing operatively connecting ing anindex, a mo\-able;pointer and'means connecting said movable pointerto said type carrier including a screw-threaded guide.

3. IA typewriting mechanism. comprising a cylindrical type carrier having a plurality of spirally arranged typesand mounted for rotation to effect type selection, an oscillatable support 'and'means for mounting said type carrier upon said support whereby it can be adjusted relatively thereto during type selection, a type key, andmeans connecting said type .key to said support whereby upon the depression of said type key said type carrier will effect the type printing. I a 1 i 4. A typewriting mechanism comprising a cylindrical'type carrier having a plurality of spirallyarranged types projecting therefrom and mountedfor rotationto effect type selection, a. shaft upon-which said type carrier is mounted, asupport for said shaft, connection between said support and said shaft comprising a screw-threaded guide, an index, a movablepointer cooperatingtheresaid movable pointer to saidshaft for ;rotat-. mg the same, whereby said type carrier will.

move axially to effect typeselection, said gearingpermitting said axial movement. 5. A 'typewriting mechanism comprising a type carrier having. a pluralityof extending types arranged along a screw line and mounted for rotation to effect typeselection, a shaft for said type carrier, an oscillatable support, cooperating screw-threads upon said shaft and said oscillatable support :for mounting said type carrier upon said'supportso that itis adjustable axially, anindex and movable pointer, a spurwheel gearing mountedcn said oscillating support, one. spur wheel of said spur wheel gearing being carried by said shaft, a'driving belt con necting said movable pointer to the other gear of saidspur wheel gearing for. rotating the same, whereby during type selection which is initiated by said.movablepointer' said shaft will be rotated and adjusted axially, isaid spur wheel gearing permitting axial displacement of said first mentioned spur wheel with respect to said second men- 116 tioned spur wheel. 7

. 6. A typewritin'g mechanism comprising a type carrier having a plurality ofcircumreventing I 7 independent rotation of said sha t.

7 A type writing mechanism comprising a type carrier having a plurality of circumferentialtypes and mounted for rotation to effect type selection, a shaft for said type carrier, an oscillating support, means for mounting said shaft upon said support to permit rotation of said shaft'and an axial adjustment thereof during type selection and an index operatively connected to said shaft for initiating said type selection, said index' comprising a telescoping pointer, a member provided with a row'of letters cooperating with said pointer and arranged along the arc of a circle, the radius of whichis greater than the shortest length ofsaid pointer, said member being formed with a groove arranged concentrically with said row of letters and a pin carried by one section of said pointer and cooperating with. said groove for keeping said pointer adj acent said letters.

8. In a typewrit-ing mechauismacyliudri cal type carrier having a plurality of spirally arranged types and mounted for rotation to effect type selection, an index provided with letters arranged in rows, a

cooperating pointer and means connecting said pointer to said typecarrier' for effecting type selection whereby movement of said pointer along a' row of letters rotates said type carrier, the adjustment of said pointer to the rows of letters displacing said type carrier in the direction of its axis of rotation.

- 9. In a typewriting machine a type carrier having a plurality of circumferential types and mounted for rotation to effect type selection, a shaft for said type carrier, a two-part telescoping support, said shaft being screw-threadedly mounted upon one part of said support, an index having rows of letters, a cooperating pointer, means connecting said pointer to the last mentioned part of said support whereby said type carrier is displaced axially when said pointer'is adjusted from one row of letters to another.

10. In a typewriting mechanism a type carrier having a pluralityof spirally ar ranged types and mounted for rotation to effect type selection, a shaft for said type carrier, a telescoping support, screwthreaded means for mounting said shaft on one section of said support whereby'rotation of said shaft will adjust said type carrier axially, an index provided with parallel rows of letters arranged in a plane, a pointer cooperating therewith, a guide element for said pointer, said pointer being displaceable along said guide element, said guide element being displaceable transversely to the rows of letters to permit said pointer to be adjusted to said rows of letters and means con necting said guide element to said section of said support whereby said type carrier may be adjusted axially; l

11. In a typewriting mechanism a cylindrical type carrier having a plurality of types arranged along a screw line and mounted for rotation to effect type selection, a shaft for said type carrier, a telescoping support, said shaft being 1 screwthreadedly united with one section of sald support whereby rotation of'sa'id shaft will axially displace said type carrier, an index comprising a cylinderprovided with parallel rows of letters, a pointer adjustable along the rows of letters, a handle for said pointer, a lever operatively connected to said handle, means connecting said lever to said cylinder whereby upon movement of said handle said cylinder will be rotated to adjust said rows, of letters with respect to said pointer, said lever being further con nected to said part of said telescoping support, whereby said type carrier will be simultaneously axially displaced.

12. In a typewriting machine a type carrier having a plurality of circumferential types and mounted for rotation to effect type selection, a shaft for said type carrier, a two-part telescoping support, said shaft be ing screw-threadedly mounted upon one part of said support, an index having rows of letters, a cooperating pointer, means connecting said pointer to the ,last mentioned part of said support whereby said type car-v rier is displaced axially when said pointer is adjusted from one row of letters to another, and means for rotating said type carrier shaft during adjustment of said pointer along a row of letters which comprises a pair of rollers, an endless steel band carried by said pair of rollers, means connecting said pointer to said steel band and a shaft and gear connectionbetween one of said rollers and said type carrier shaft.

13. In a typewriting mechanism a type carrier having a plurality of spirally arranged types and mounted for rotation to effect type selection, a shaft for said type carrier, a support comprising two telescoping parts, a screw-threaded union between said shaft and one part of said support, an index having rows of letters and a pointer, means connecting said pointer to the last mentioned part of said support whereby when said pointer is adjusted from one row of letters to another said part of the support and said type carrier are displaced axially, an aligning tooth carried by said last mentioned, part of the support and adapted to cooperate with a rack provided on the frame of the machine in order to se cure alignment of the types to be printed.

14. A typewriting mechanism comprising a type carrier having a plurality of spirally arranged types and mounted for rotation to effect type selection, a shaft for said type carrier, an oscillatable support, said shaft and oscillatable support being provided with cooperating screw-threads for mounting said shaft upon said support whereby rotation of said shaft effects an axial displacement thereof and type selection, an in 'dex, a movable pointer cooperating therewith, gearing mounted upon said oscillatable support and connected to said type carrier shaft and an endless belt operatively connecting said pointer to said'gearing, said endless belt being disposed parallel to the axis of oscillation of said oscillatable support. 7

15. In a typewriting mechanism, a type carrier having a plurality ofspirally ar- 'key to said support for oscillating said support to effect type printing.

The foregoing specification signed at Essen, Germany, this 25th day. of October,

ADOLF SIEPMANN. AUGUST RADEMACHER.

In presence of HANS GOTTSMANN, JoHANN DECKER. 

